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US 5,222,432 AGranted
Wiping device of an intaglio printing machine
AssigneeDe La Rue Giori S.A.
InventorJohannes G. Schaede
Life of this patent
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AssigneeDe La Rue Giori S.A.
InventorJohannes G. Schaede
Estimating the term…
The wiping device operates with at least one cylinder (3) which receives the ink raised from the printing plates and against which rests a doctor blade (4) which removes the ink from said cylinder (3). In order to clean the doctor blade (4) reliably from ink during the printing operation, there are mounted on the opposite longitudinal edges of said doctor blade (4) wall parts (6) which are U-shaped in the plan view and whose U-limbs (6a) are directed towards one another. Between said U-limbs (6a), an ink slide (8) is moved constantly back and forth on the doctor blade surface by a drive device, the side parts of said ink slide facing the wall parts being adapted to the design of said wall parts. Installed on the back of the doctor blade (4) on each side is an ink pump whose slot-shaped inlet opening (12) extends between the U-limbs of the relevant wall part (6). The ink slide (8) which is moved back and forth acts like a displacement body and pushes the ink passing onto the doctor blade alternately into the inside space bounded by the one or by the other wall part (6), where it is conveyed away by the ink pump and fed to a container.
Wiping device of an intaglio printing machine having at least one cylinder (3) onto which the ink raised from the printing plates is transferred, and having a doctor blade (4) resting against said cylinder (3) for removing the ink from the cylinder surface, characterised in that there are arranged on the downwardly inclined doctor blade (4) wall parts (6) which are located laterally opposite one another and, between these wall parts, an ink slide (8), which is movable back and forth on the doctor blade surface by means of a drive device, in the form of a displacement body adapted on both sides to the wall parts (6), and in that there is installed on each side below the doctor blade surface an ink pump (11) whose inlet opening (12) opens out on the doctor blade surface and extends along the lower edge of an inner surface (7) of a respective said wall part (6) in such a way that the ink passing between the two wall parts (6) is displaced by the ink slide (8) alternately to the one and to the other inlet opening (12), where it is conveyed away by the relevant ink pump (11).
Dependencies are inferred from the claim text.